264 Win Mag and 7mm Rem Mag Ramshot LRT data (and Retumbo).

[2Old2Care]

I have had great success with LRT in my 257 Roy and my 6.5 RPM. Great velocity, little pressure and good sd's. It's temp
stable which is extremely important out here in West Texas.

Mind sharing your load info for the RPM? Thanks

 

[ARlife4me]

For Ramshot LRT, QL shows the following for my 264WM, a 147 ELD-M, my particular brass (86 gr H2O) and COAL (3.34") so YMMV.

Fill.	Charge
%	Grains
95​	71​
96​	71.5​
96​	72​
97​	72.5​
98​	73​
98​	73.5​
99​	74​
100​	74.5​
100​	75​
101​	75.5​
102​	76​
102​	76.5​
103​	77​
104​	77.5​
104​	78​
105​	78.5​

The 86gr H2O is an empty case or usable like QL gives?

 

[txsheepman]

Mind sharing your load info for the RPM? Thanks

My RPM is on a rem 700 with a Hart 1/8 5R 26" barrel. We found a really good node with 73.6 gr of LRT 3.595" COL and 3120fps with Berger 156 EOL. I think the Weatherby ones are 1/9.

 

[2Old2Care]

My RPM is on a rem 700 with a Hart 1/8 5R 26" barrel. We found a really good node with 73.6 gr of LRT 3.595" COL and 3120fps with Berger 156 EOL. I think the Weatherby ones are 1/9.

Thanks for the info; that helps. I have some 156s and my Wby now wears a Proof 1/8 stainless, so I'll drop down a bit and give them a try. Because it was available, I picked up two pounds of the LRT and only then learned there isn't a lot of loading data for that powder for the RPM. Grew up in your country; so beautiful.

 

[entoptics]

The 86gr H2O is an empty case or usable like QL gives?

Empty. Usable says 76.2 grains. This is relatively light weight R-P brass from some bygone era, so I think it's on the voluminous side.

 

[txsheepman]

Thanks for the info; that helps. I have some 156s and my Wby now wears a Proof 1/8 stainless, so I'll drop down a bit and give them a try. Because it was available, I picked up two pounds of the LRT and only then learned there isn't a lot of loading data for that powder for the RPM. Grew up in your country; so beautiful.

I called Berger and asked them for some data and they provided a great starting point.

 

[JC7651]

Got my hands on a pound of Ramshot LRT finally, and 9lbs of Unicorn Tears (Retumbo), so went out today to get a rough idea of charge weights for my 264 Win Mag and 7 Rem Mag. Figured the LRT data might be helpful for others, as I didn't find much in the online reloading manuals. No accuracy info, as I was only shooting one shot per load to get a velocity graph.

Temp was ~44° F, data collected on a LabRadar.

264 Win Mag. 24", 1:8, 5R, X-Caliber (Savage). 2X Fired R-P brass (Weight ~230 gr, Volume ~86 gr H2O). COAL = 3.340", ~0.02" off lands.
Ramshot LRT, 147 ELD-M
View attachment 351594

Retumbo, 147 ELD-M
View attachment 351595


7mm Rem Mag. 26", 1:8, 5R, X-Caliber (Savage). 2X Fired ADG brass (Weight ~245 gr, Volume ~84 gr H2O). COAL = 3.335", ~0.02" off lands.
Ramshot LRT
View attachment 351598

Retumbo, 175 ELD-X
View attachment 351599

Some comments...

I saw no signs of pressure up to the max tested, so there's a bit more room to go, though I doubt I'll push it any further. I'm very happy with velocities for both powders, and want to leave a little room for temperature increases during the summer.

I pressured out in both cartridges at lower velocities with both H1000 and RL26.

Though Quickload and most reloading manuals indicate I would be well over 100% case fill with LRT, that doesn't seem to be the case. The max loads above still had some "rattle", though they were definitely right up near the neck/shoulder junction.

Hope this helps someone else thinking about trying LRT in a 264 or 7 mag.

Hi guys. I've been reading and enjoying the forum for a few years now but this is my first post. I have the exact same barrel on my 7mm RM and it's definitely a shooter. I have 8lbs of LRT on the way and am looking forward to working with it. If pressures are as linear as the velocity increases it should be a great choice. It certainly doesn't seem spikey by your chart plot.
I am shooting the same 175gr ELD-X from my rifle over 67.5 grains of RL25. It performs very well giving 3003 fps measured with my Magnetospeed. Groups are consistently under 1/2 inch at 100 yards. With the uncertainty of components I figured I'd give LRT a try as an added option. I'm really looking forward to seeing how it performs with 175gr ELD-Xs, and 180gr Berger Hybrids. I love slow ball powders in the 7mm Rem Mag. I've been mad ever since 870 was discontinued. US869 does great for me with the 180gr Hybrids. 2900 fps and it groups consistently as well. It's a compressed charge but shoots very well.

 

[Outlaw6.0]

These posts make me want to try LRT in some of my other cartridges. It impressed the heck out of me in 338RUM. Being that it is nearly always available & still at what I consider normal prices, I might have to pick up more & experiment.



t

 

[JC7651]

Received the 8lb jug of LRT and another brick of BR primers today, so I'm looking forward to the initial ladders. I also saw that Hodgdon has Staball HD and Match in stock. They didn't have any 8 pounders so I ordered the max of 5 1lb cans of HD for this month.

I'll get my LRT ladders loaded this weekend with 175gr ELD-X, 180gr Berger Hybrids and send them down range next weekend weather permitting.

 

[std7mag]

I picked up 2# of LRT while at the LGS last week.
Plan on trying it in 7mm Rem Mag with 175gr ABLR.
Also my 7mm WBY Mag.

And i have a new to me 257 WBY Mag coming within the next 2 weeks.

 

[FEENIX]

I recently picked up a # of LRt as well with intention of trying it in my 264 WM Improved with 156 EOLs.

Thanks for your results. It looks promising.

Mike,

Just in case you need it as a baseline for your load development.

Ed

 

[Chas1]

Great data, thanks for the effort.

 

[Mike D Texas]

Mike,

Just in case you need it as a baseline for your load development.

View attachment 428329

Ed

Thanks Ed. Remember mine is an improved case with a long throat. I want to say I'm over 80 grains of LRT and have hit 3400fps.

 

[FEENIX]

Thanks Ed. Remember mine is an improved case with a long throat. I want to say I'm over 80 grains of LRT and have hit 3400fps.

Yep, I remember, that's why I said baseline. Berger does not have .338 NMI load for their 250s/300s but I am using their .338 NM recommendations. Mine has aggressive improvements over NMI SAAMI just like your .264 WMI.